Enhanced citrate production through gene insertion in Aspergillus niger
Wian de Jongh, Jens Nielsen
The effect of inserting genes involved in the reductive branch of the tricarboxylic acid (TCA) cycle on citrate production by Aspergillus niger was evaluated. Several different genes were inserted individually and in combination, i.e. malate dehydrogenase (mdh2) from Saccharomyces cerevisiae, two truncated, cytosolic targeted, fumarases (Fum1s and FumRs) from S. cerevisiae and Rhizopus oryzae, respectively, and the cytosolic soluble fumarate reductase (Frds1) from S. cerevisiae. Overexpression of these genes in their native strain backgrounds has been reported to lead to alterations in the intracellular cytosolic dicarboxylate concentrations. It was found that all the transformant strains had enhanced yield and productivities of citrate compared with the wild-type strain. The transformants also had the ability to produce citrate in trace-manganese-contaminated medium, where the wild type was unable to produce. Overexpression of FumRs and Frds1 resulted in the best citrate-producing strain in the presence of trace manganese concentrations. This strain gave a maximum yield of 0.9 g citrate per g glucose and a maximum specific productivity of 0.025 g citrate per g DW per h. Overexpression of mdh2 alone resulted in an increased citrate production rate only in the initial phase of the fermentations compared with the other transformants and the wild type. (C) 2007 Elsevier Inc. All rights reserved.
Metabolic Engineering
https://doi.org/10.1016/j.ymben.2007.11.002
10.1016/j.ymben.2007.11.002
Fingerprint Dive into the research topics of 'Enhanced citrate production through gene insertion in Aspergillus niger'. Together they form a unique fingerprint.
Aspergillus Chemical Compounds
Aspergillus niger Medicine & Life Sciences
Insertional Mutagenesis Medicine & Life Sciences
Citric Acid Medicine & Life Sciences
Yeast Engineering & Materials Science
Oxidoreductases Engineering & Materials Science
Manganese Engineering & Materials Science
Jongh, W. D., & Nielsen, J. (2007). Enhanced citrate production through gene insertion in Aspergillus niger. Metabolic Engineering, 10(2), 87-96. https://doi.org/10.1016/j.ymben.2007.11.002
Jongh, Wian de ; Nielsen, Jens. / Enhanced citrate production through gene insertion in Aspergillus niger. In: Metabolic Engineering. 2007 ; Vol. 10, No. 2. pp. 87-96.
@article{15663fd0047e42c3975c1c5f63676c84,
title = "Enhanced citrate production through gene insertion in Aspergillus niger",
abstract = "The effect of inserting genes involved in the reductive branch of the tricarboxylic acid (TCA) cycle on citrate production by Aspergillus niger was evaluated. Several different genes were inserted individually and in combination, i.e. malate dehydrogenase (mdh2) from Saccharomyces cerevisiae, two truncated, cytosolic targeted, fumarases (Fum1s and FumRs) from S. cerevisiae and Rhizopus oryzae, respectively, and the cytosolic soluble fumarate reductase (Frds1) from S. cerevisiae. Overexpression of these genes in their native strain backgrounds has been reported to lead to alterations in the intracellular cytosolic dicarboxylate concentrations. It was found that all the transformant strains had enhanced yield and productivities of citrate compared with the wild-type strain. The transformants also had the ability to produce citrate in trace-manganese-contaminated medium, where the wild type was unable to produce. Overexpression of FumRs and Frds1 resulted in the best citrate-producing strain in the presence of trace manganese concentrations. This strain gave a maximum yield of 0.9 g citrate per g glucose and a maximum specific productivity of 0.025 g citrate per g DW per h. Overexpression of mdh2 alone resulted in an increased citrate production rate only in the initial phase of the fermentations compared with the other transformants and the wild type. (C) 2007 Elsevier Inc. All rights reserved.",
author = "Jongh, {Wian de} and Jens Nielsen",
doi = "10.1016/j.ymben.2007.11.002",
journal = "Metabolic Engineering",
publisher = "Academic Press",
Jongh, WD & Nielsen, J 2007, 'Enhanced citrate production through gene insertion in Aspergillus niger', Metabolic Engineering, vol. 10, no. 2, pp. 87-96. https://doi.org/10.1016/j.ymben.2007.11.002
Enhanced citrate production through gene insertion in Aspergillus niger. / Jongh, Wian de; Nielsen, Jens.
In: Metabolic Engineering, Vol. 10, No. 2, 2007, p. 87-96.
T1 - Enhanced citrate production through gene insertion in Aspergillus niger
AU - Jongh, Wian de
AU - Nielsen, Jens
N2 - The effect of inserting genes involved in the reductive branch of the tricarboxylic acid (TCA) cycle on citrate production by Aspergillus niger was evaluated. Several different genes were inserted individually and in combination, i.e. malate dehydrogenase (mdh2) from Saccharomyces cerevisiae, two truncated, cytosolic targeted, fumarases (Fum1s and FumRs) from S. cerevisiae and Rhizopus oryzae, respectively, and the cytosolic soluble fumarate reductase (Frds1) from S. cerevisiae. Overexpression of these genes in their native strain backgrounds has been reported to lead to alterations in the intracellular cytosolic dicarboxylate concentrations. It was found that all the transformant strains had enhanced yield and productivities of citrate compared with the wild-type strain. The transformants also had the ability to produce citrate in trace-manganese-contaminated medium, where the wild type was unable to produce. Overexpression of FumRs and Frds1 resulted in the best citrate-producing strain in the presence of trace manganese concentrations. This strain gave a maximum yield of 0.9 g citrate per g glucose and a maximum specific productivity of 0.025 g citrate per g DW per h. Overexpression of mdh2 alone resulted in an increased citrate production rate only in the initial phase of the fermentations compared with the other transformants and the wild type. (C) 2007 Elsevier Inc. All rights reserved.
AB - The effect of inserting genes involved in the reductive branch of the tricarboxylic acid (TCA) cycle on citrate production by Aspergillus niger was evaluated. Several different genes were inserted individually and in combination, i.e. malate dehydrogenase (mdh2) from Saccharomyces cerevisiae, two truncated, cytosolic targeted, fumarases (Fum1s and FumRs) from S. cerevisiae and Rhizopus oryzae, respectively, and the cytosolic soluble fumarate reductase (Frds1) from S. cerevisiae. Overexpression of these genes in their native strain backgrounds has been reported to lead to alterations in the intracellular cytosolic dicarboxylate concentrations. It was found that all the transformant strains had enhanced yield and productivities of citrate compared with the wild-type strain. The transformants also had the ability to produce citrate in trace-manganese-contaminated medium, where the wild type was unable to produce. Overexpression of FumRs and Frds1 resulted in the best citrate-producing strain in the presence of trace manganese concentrations. This strain gave a maximum yield of 0.9 g citrate per g glucose and a maximum specific productivity of 0.025 g citrate per g DW per h. Overexpression of mdh2 alone resulted in an increased citrate production rate only in the initial phase of the fermentations compared with the other transformants and the wild type. (C) 2007 Elsevier Inc. All rights reserved.
U2 - 10.1016/j.ymben.2007.11.002
DO - 10.1016/j.ymben.2007.11.002
JO - Metabolic Engineering
JF - Metabolic Engineering
Jongh WD, Nielsen J. Enhanced citrate production through gene insertion in Aspergillus niger. Metabolic Engineering. 2007;10(2):87-96. https://doi.org/10.1016/j.ymben.2007.11.002